prevent files[index] is undefined errors

src/components/PhotoFrame.tsx

@@ -334,7 +334,8 @@ const PhotoFrame = ({
             handleSelect(filteredData[index].id, index)(!checked);
         }
     };
-    const getThumbnail = (files: EnteFile[], index: number) => (
+    const getThumbnail = (files: EnteFile[], index: number) =>
+        files[index] ? (
             <PreviewCard
                 key={`tile-${files[index].id}-selected-${
                     selected[files[index].id] ?? false
@@ -357,6 +358,8 @@ const PhotoFrame = ({
                     (index >= currentHover && index <= rangeStart)
                 }
             />
+        ) : (
+            <></>
         );
 
     const getSlideData = async (

src/components/PhotoList.tsx

@@ -439,7 +439,7 @@ export function PhotoList({
             }
         }
     };
-    if (!timeStampList) {
+    if (!timeStampList?.length) {
         return <></>;
     }